fix

src/app.json

@@ -8,7 +8,7 @@
   "window": {
     "backgroundTextStyle": "light",
     "navigationBarBackgroundColor": "#fff",
-    "navigationBarTitleText": "WeChat",
+    "navigationBarTitleText": "",
     "navigationBarTextStyle": "black"
   }
 }

src/pages/login/main.json

 {
-  
+    "navigationBarTitleText": "登录"
 }

src/pages/wxPay/main.json

+{
+    "navigationBarTitleText": "支付"
+}